Concrete construction.



vJ. E. GONZBLMAN.

CONCRETE CONSTRUCTION.

APPLMATION FILED APR.14, 1910,

Patented May 16,1911.

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.IoHN E. coNzELMAN, on ST. LouIsMIssoURr, AssIeNonroumrconstrnuorrolv ,COMPANY, or ST. LOUIS, vrrssounr, A CORPORATION or nnnewnnn. 7

CONCRETE CONSTRUCTION.

Specification of Letters Patent. Patented May 16, 1911'.

Application'filed April 14, 1910. Serial No. 555,355.

To all whom it mag concern:

Be it known that I, J OHN E. 'tToNznmn-m, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented certain new and useful Improve" provide means for uniting adjacent slabs so that the adjoining edges of each are locked securely together.

A further object of this invention is to provide reinforcement for connecting the uniting means between a pair of slabs that rest on one side of a beam or support with the uniting means between a pair of'slabs that rest on the opposite side of said beam or support.

In the drawings forming part of this specification, in which like numbers of reference denote like'parts wherever they occur, Figure 1 is a perspective View showing two pairs of slabsresting on abeam, apart of the beam and two of the slabs being broken away to show the formation of the edges of the other'two slabs; Fig. 2 is a sectional view on the line 2-2, Fig. 1; Fig. 3 is a sectional view on the line 3-3, Fig.1; and Fig. 4: is a perspective view of part of the con-. crete, key that is formed between two adjoining slabs.

Each slab 1 is molded with any desired configuration.

The. beam 2 is preferably formed with substantially the same shape "in cross-sectional configuration as the beam disclosed in my'copending application Serial; No. 528,298,-filed November 16, 1909. Said beam is provided with a pair .of shoulders 3 and a tenon 4. A flan e 5 of slab 1 rests on a shoulder 3 and against tenon 4. Said flange 5 raises the top surface of slab 1 to a greater distance above shoulder 3 than the distance the tenon 4 projects above said shoulder, so that, when a slab is placed upon each shoulder 3 ,of beam 2, a-space 6 above tenon 4 is left between the two slabs supported by said Each edge of slab 1 that is disposed at an angle to shoulder 3 of beam 2 is provided with a groove 7 and a groove or grooves 8, groove 7 being preferably arranged to extend the entire length of said edge, and

groove 8 being located above groove 7 in order to communicate with'space 6 and ar= ranged to extend only a short distance of the length of said edge. When two slabs are placed upon one shoulder 3 of-a beam 2, a crack 9 is left between the adjoining edges of said slabs and the grooves 7 and 8 of one slab register with the grooves 7 and 8, respectively, of the other slab. When another pair of slabs 1 is similarly placed upon the other shoulder 3 of said beam, the crack 9 between said pair of slabs alines with the other crack 9between'said two slabs. Boards or formers (not shown in the drawings) are placed underneath cracks 9, and grout or similar cement mixture or wet concreteispoured into space 6. and, also, upon said boards or formers a'nd'into cracks 9. The

grout or other mixture in space 6 and cracks 9 is leveled off flush with the surface of said slabs, and, when it sets, unites said slabs and beam 2 integrally together. When the grout or other mixture is poured into a crack 9, it

7 fills grooves 7 and 8, and, when it sets, forms a cement or concrete key.10 with tongues 11 and 12 projecting into grooves 7 and 8, re-

spectively, and unites, the adjoining edges of slabs 1 forming said crack integrally to gether. 5

As anadditional strengthening means a reinforcing bar 13. is embedded in grooves 8 in one crack 9 and is arranged to extend over beam 2 and project into the grooves 8 in the other crack 9 in order to tie the cement or concrete keys in said cracks firmly to gether and, also, to hold the slabs 1 snugly against'tenon 4. Bars 14 lie near the bottom surface of each slab to prevent sagging and extend preferably in both directions in said slab Adjacent their ends each ,bar 14, turns upwardly and extends near the top surface of said slab. The ends of said bars 14 extend downwardly into flange '5 in order to support a bar or bars 15- embedded in said flanges.

1 claim: a

1. A concrete structure comprising a beam, slabs arranged. in pairs on opposite sides of said beam and having their top faces extending above the beam top toform apart to form cracks on opposite sides of the beam, a tie rod which is disposed in a space between thesame above said beam, each pair of slabs on the same side of the beam having grooves in theadjoining side edges thereof and forming a crack between the same, concrete keys lntegrally uniting said pairs of slabs and occupying the cracks between the same and having tongues extending into and integrally uniting with said grooves, a tie-rod extending over said beam and connecting a tongue of one of said keys with a tongue of the other one of said keys, and a concrete filler for said space adapted to set integrally with said keys, said beam, and the edges of said slabs surroundingsaid space.

2. A concrete structure comprising a beam, slabs on opposite sides of the beam, the slabs on the same side of the beam and on their adjoining faces being formed with registering grooves, and being spaced apart at their adjoining faces to'form cracks, a tie rod which extends across the top face of the beam and which has its end portions disposed in the said grooves, and a concrete key filling each of the cracks, said concrete keys being formed with outwardly extending tongues on their opposite sides which aline with the tie rod, the latter being embedded in the keys, said tie rod connecting the keys, which latter are disposed on opposite sides of the beam,

3. A concrete structure comprising a beam, slabs on opposite sides of the beam supported thereby and having their top faces extending above the top face of the beam, the slabs on the same side of the beam having their adjoining ends spaced apart to form cracks on opposite sides of the beam, a tying element extending across the beam and into each of said cracks, and a cement key filling each of the cracks, and surrounding said tying element and a grout filling above the beam engaging between the projecting portions of the slabs.

4. A concrete structure comprising a beam, slabs on opposite sides ofthe beam supported thereby and having their top faces extending above the top face of the beam, the slabs on the same side of the beam having their adjoining ends spaced said space and which is located above the beam and has its end portions extending on opposite sides of the beam, a concrete key in each crack, and a concrete filler on the beam which surrounds the tie-rod and is made flush with the top faces of the slabs.

5. A concrete structure comprising a beam, slabs on opposite sides of the beam the slabs on the same side of the beam having their adjoining ends spaced apart to form cracks on opposite sides of the beam and being further formed with spaced longitudinal registering grooves, a tie rod in one of the grooves extending across the beam and serving to tie the opposite slabs together, and a concrete key in each of the cracks surrounding the tie rod and filling the registering grooves.

-6. A concrete.- structure comprising a beam, slabs on opposite sides of the beam, the slabs on the same side of the beam having their adjoining ends spaced apart to form a crack on each side of the beam and being formed with registering grooves, the slabs having their top faces projecting above the top face of the beam, a tiered extending above the beam and on opposite sides of the latter and into the registering grooves of theslabs, a concrete key for each crack, said keys surrounding the end portions of the tie rod and extending int'o said registering grooves to fill the latter, and a concrete filler overlying the beam and formed flush with the top faces of the slabs,

said concrete filler completely surrounding the central portion of the tie rod.

7. A concrete structure. comprising two pairs of slabs, the slabs of each pair being arranged in side by side relation and the pairs being arranged-opposite to each other and having their vertical end faces disposed in spaced relation, the respective adjacent vertical end faces of each pair of slabs being formed with spaced registering grooves, a tie rod disposed in one of the registering grooves extending across the space between.

the two pairs of slabs and connecting both pairs of slabs, and a "concrete key .filling said space between the two pairs of slabs and surrounding the tie rod, said key having tongues which extend into the register ing grooves. V

In testimony whereof I have affixed my signature in presence of two witnesses.

JOHN E. CONZELMAN. Witnesses:

GLADYS WALTON, HUGH K. lVAcNnR. v 

